[root@linux-node1 ~]# cat /etc/redhat-release

CentOS Linux release 7.5.1804 (Core)

[root@linux-node1 ~]# uname -r

3.10.0-862.el7.x86_64

[root@linux-node1 ~]# cat /etc/os-release

NAME="CentOS Linux"

VERSION="7 (Core)"

ID="centos"

ID_LIKE="rhel fedora"

[root@linux-node1 ~]# hostname -I

192.168.99.24

[root@linux-node1 ~]# yum -y install nginx

[root@linux-node1 ~]# systemctl start nginx.service

[root@linux-node1 ~]# systemctl enable nginx.service

[root@linux-node1 ~]# cp /etc/nginx/nginx.conf{,.bck}

[root@linux-node1 ~]# egrep -v "#|^$" /etc/nginx/nginx.conf.bck > /etc/nginx/nginx.conf

[root@linux-node1 ~]# cat -n /etc/nginx/nginx.conf

    28	        location / {

    29				autoindex on;

    30				autoindex_exact_size off;

    31				autoindex_localtime on;

    32	        }

[root@linux-node1 ~]# cd /usr/share/nginx/html/

[root@linux-node1 html]# ls

404.html  50x.html  index.html  nginx-logo.png  poweredby.png

[root@linux-node1 html]# rm -rf *

[root@linux-node1 html]# ls

Anti-Fire Trainning  CCTV News Daily  Documents

autoindex on;

autoindex_exact_size off;

默认为on，显示出文件的确切大小，单位是bytes。

改为off后，显示出文件的大概大小，单位是kB或者MB或者GB

autoindex_localtime on;

默认为off，显示的文件时间为GMT时间。

改为on后，显示的文件时间为文件的服务器时间

[root@linux-node1 ~]# htpasswd --help

Usage:

	htpasswd [-cimBdpsDv] [-C cost] passwordfile username

	htpasswd -b[cmBdpsDv] [-C cost] passwordfile username password

	htpasswd -n[imBdps] [-C cost] username

	htpasswd -nb[mBdps] [-C cost] username password

 -c  Create a new file.

 -n  Don't update file; display results on stdout.

 -b  Use the password from the command line rather than prompting for it.

 -i  Read password from stdin without verification (for script usage).

 -m  Force MD5 encryption of the password (default).

 -B  Force bcrypt encryption of the password (very secure).

 -C  Set the computing time used for the bcrypt algorithm

     (higher is more secure but slower, default: 5, valid: 4 to 31).

 -d  Force CRYPT encryption of the password (8 chars max, insecure).

 -s  Force SHA encryption of the password (insecure).

 -p  Do not encrypt the password (plaintext, insecure).

 -D  Delete the specified user.

 -v  Verify password for the specified user.

On other systems than Windows and NetWare the '-p' flag will probably not work.

The SHA algorithm does not use a salt and is less secure than the MD5 algorithm.